{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-92798", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-09-16T19:44:13.265Z", "datePublished": "2026-10-17T03:43:31.068Z", "dateUpdated": "2026-10-17T03:43:31.068Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-17T03:43:31.068Z"}, "affected": [{"vendor": "wpeverest", "product": "User Registration & Membership \u2013 Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "5.2.8", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 5.2.8 This is due to insufficient input sanitization in the 'referrer_url' branch of UR_Smart_Tags::process(), where the attacker-controlled HTTP_REFERER header is only passed through sanitize_text_field() \u2014 which does not strip WordPress shortcode delimiters \u2014 before being substituted into a Content Restriction message that is subsequently executed via apply_shortcodes()/do_shortcode(). This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes on any restricted page whose message uses the supported {{referrer_url}} smart tag."}], "title": "User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Referer Header via 'referrer_url' Smart Tag", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/ec317df9-c7ef-49a3-9818-903dfe4bdd03?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/class-ur-smart-tags.php#L475"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/class-ur-smart-tags.php#L474"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/modules/content-restriction/class-urcr-frontend.php#L1383"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/modules/content-restriction/functions-urcr-core.php#L693"}, {"url": "https://plugins.trac.wordpress.org/changeset/3741339/user-registration/trunk/includes/class-ur-smart-tags.php"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-94 Improper Control of Generation of Code ('Code Injection')", "cweId": "CWE-94", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH"}}], "credits": [{"lang": "en", "type": "finder", "value": "Passakorn Yookindee"}], "timeline": [{"time": "2026-09-16T19:59:06.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-10-16T14:42:54.000Z", "lang": "en", "value": "Disclosed"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "User Registration & Membership \u2013 Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder", "vendor": "wpeverest", "versions": [{"lessThanOrEqual": "5.2.8", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 5.2.8 This is due to insufficient input sanitization in the 'referrer_url' branch of UR_Smart_Tags::process(), where the attacker-controlled HTTP_REFERER header is only passed through sanitize_text_field() \u2014 which does not strip WordPress shortcode delimiters \u2014 before being substituted into a Content Restriction message that is subsequently executed via apply_shortcodes()/do_shortcode(). This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes on any restricted page whose message uses the supported {{referrer_url}} smart tag."}], "id": "CVE-2026-92798", "lastModified": "2026-10-17T04:17:10.257", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-10-17T04:17:10.257", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/class-ur-smart-tags.php#L474"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/class-ur-smart-tags.php#L475"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/modules/content-restriction/class-urcr-frontend.php#L1383"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/modules/content-restriction/functions-urcr-core.php#L693"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3741339/user-registration/trunk/includes/class-ur-smart-tags.php"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/ec317df9-c7ef-49a3-9818-903dfe4bdd03?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

{"created": "2026-10-17T06:00:04.205332+00:00", "updated": "2026-10-17T06:00:04.205346+00:00", "vendors": []}